The population of Gary was 80,294 at the 2010 census,[10] making it the ninth-largest city in the state of Indiana. It was a prosperous city from the 1920s through the mid-1960s due to its booming steel industry, but overseas competition and restructuring of the steel industry resulted in a decline and a severe loss of jobs.

Since the late 1960s, Gary has suffered drastic population loss, falling by 55 percent from its peak of 178,320 in 1960.[11] The city faces the difficulties of many Rust Belt cities, including unemployment, decaying infrastructure, and low literacy and educational attainment levels. It is estimated that nearly one-third of all houses in the city are unoccupied or abandoned.

Gary was the site of civil unrest in the steel strike of 1919. On October 4, 1919, a riot broke out on Broadway, the main north-south street through downtown Gary, between striking steel workers and strike breakers brought in from outside. Three days later, Indiana governor James P. Goodrich declared martial law. Shortly thereafter, over 4,000 federal troops under the command of Major General Leonard Wood arrived to restore order.[12]

The jobs offered by the steel industry provided Gary with very rapid growth and a diverse population within the first 26 years of its founding. According to the 1920 United States Census, 29.7% of Gary's population at the time was classified as foreign-born, mostly from eastern European countries, with another 30.8% classified as native-born with at least one foreign-born parent. By the 1930 United States Census, the first census in which Gary's population exceeded 100,000, the city was the fifth largest in Indiana and comparable in size to South Bend, Fort Wayne, and Evansville. At that time, 19.3% of the population was classified as foreign-born, with another 25.9% as native-born with at least one foreign-born parent. In addition to white internal migrants, Gary had attracted numerous African-American migrants from the South in the Great Migration, and 17.8% of the population was classified as black. 3.5% was classified as Mexican (now likely to be identified as Hispanic, as some were likely American citizens in addition to immigrants).

Gary's fortunes have risen and fallen with those of the steel industry. The growth of the steel industry brought prosperity to the community. Broadway was known as a commercial center for the region. Department stores and architecturally significant movie houses were built in the downtown area and the Glen Park neighborhood.

In the 1960s, like many other American urban centers reliant on one particular industry, Gary entered a spiral of decline. Gary's decline was brought on by the growing overseas competitiveness in the steel industry, which had caused U.S. Steel to lay off many workers from the Gary area. The U.S. Steel Gary Works employed over 30,000 in 1970, declined to just 6,000 by 1990, and further declined to 5,100 in August 2015. Attempts to shore up the city's economy with major construction projects, such as a Holiday Inn hotel and the Genesis Convention Center, failed to reverse the decline.[13][14]

Rapid racial change occurred in Gary during the late 20th century. These population changes resulted in political change which reflected the racial demographics of Gary: the non-white share of the city's population increased from 21% in 1930, 39% in 1960, to 53% in 1970. Non-whites were primarily restricted to live in the Midtown section just south of downtown (per the 1950 Census, 97% of the black population of Gary was living in this neighborhood). Gary had one of the nation's first African-American mayors, Richard G. Hatcher, and hosted the ground-breaking 1972 National Black Political Convention.[15]

In the late 1990s and early 2000s, Gary had the highest percentage of African-Americans of U.S. cities with a population of 100,000 or more, 84% (as of the 2000 U.S. census). This no longer applies to Gary since the population of the city has now fallen well below 100,000 residents. As of 2013, the Gary Department of Redevelopment has estimated that one-third of all homes in the city are unoccupied and/or abandoned.[16]

U.S. Steel continues to be a major steel producer, but with only a fraction of its former level of employment. While Gary has failed to reestablish a manufacturing base since its population peak, two casinos opened along the Gary lakeshore in the 1990s, although this has been aggravated by the state closing of Cline Avenue, an important access to the area. Today, Gary faces the difficulties of a Rust Belt city, including unemployment, decaying infrastructure, and low literacy and educational attainment levels.

Gary has closed several of its schools within the last ten years. While some of the school buildings have been reused, most remain unused since their closing. As of 2014, Gary is considering closing additional schools in response to budget deficits.[17][18]

Gary chief of police Thomas Houston was convicted of excessive force and abuse of authority in 2008; he died in 2010 while serving a three-year, five-month federal prison sentence.[19][20]

In April 2011, 75-year-old mayor Rudy Clay announced that he would suspend his campaign for reelection as he was being treated for prostate cancer. He endorsed rival Karen Freeman-Wilson, who won the Democratic mayoral primary in May 2011.[21] Freeman-Wilson won election with 87 percent of the vote and her term began in January 2012; she is the first woman elected mayor in the city's history.[22] She was reelected in 2015.[23] She was defeated in her bid for a third term in the 2019 Democratic primary.

Downtown Gary is separated by Broadway into two distinctive communities. Originally, the City of Gary consisted of The East Side, The West Side, The South Side (the area south of the train tracks near 9th Avenue), and Glen Park, located further South along Broadway. The East Side was demarcated by streets named after the States in order of their acceptance into the Union. This area contained mostly wood-frame houses, some of the earliest in the city, and became known in the 20th century for its ethnic populations from Europe and large families. The single-family houses had repeating house designs that alternated from one street to another, with some streets looking very similar. Among the East Side's most notable buildings were Memorial Auditorium (a large red-brick and stone civic auditorium and the site of numerous events, concerts and graduations), The Palace Theater, Emerson School, St. Luke's Church, H.C. Gordon & Sons, and Goldblatt's Department stores, in addition to the Fair Department Store. All fronted Broadway as the main street that divided Gary.

The West Side of Gary, or West of Broadway, the principal commercial street, had streets named after the presidents of the United States in order of their election. Lytton's, Hudson's ladies store, J.C. Penney, and Radigan Bros Furniture Store developed on the west side of Broadway. Developed later, this side of town was known for its masonry or brick residences, its taller and larger commercial buildings, including the Gary National Bank Building, Hotel Gary (now Genesis Towers), The Knights of Columbus Hotel & Building (now a seniors building fronting 5th Avenue), the Tivoli Theater (demolished), the U.S. Post Office, Main Library, Mercy and Methodist Hospitals and Holy Angels Cathedral and School. The West Side also had a secondary principal street, Fifth Avenue, which was lined with many commercial businesses, restaurants, theaters, tall buildings, and elegant apartment buildings. The West Side was viewed as having wealthier residents. The houses dated from about 1908 to the 1930s. Much of the West Side's housing were for executives of U.S. Steel and other prominent businessmen. Notable mansions were 413 Tyler Street and 636 Lincoln Street. Many of the houses were on larger lots. By contrast, a working-class area was made up of row houses made of poured concrete were arranged together and known as "Mill Houses"; they were built to house steel mill workers.

The areas known as Emerson and Downtown West combine to form Downtown Gary. It was developed in the 1920s and houses several pieces of impressive architecture, including the Moe House , designed by Frank Lloyd Wright, and another, the Wynant House (1917), which was destroyed by fire. A significant number of older structures have been demolished in recent years because of the cost of restoration. Restructuring of the steel and other heavy industry in the late 20th century resulted in a loss of jobs, adversely affecting the city.

Abandoned buildings in the downtown area include historic structures such as Union Station, the Palace Theater, and City Methodist Church. A large area of the downtown neighborhood (including City Methodist) was devastated by a major fire on October 12, 1997.[24][25] Interstate 90 was constructed between downtown Gary and the United States Steel plant.

Ambridge Mann is a neighborhood located on Gary's near west side along 5th Avenue. Ambridge was developed for workers at the nearby steel plant in the 1910s and 1920s. It is named after the American Bridge Works, which was a subsidiary of U.S. Steel. The neighborhood is home to a huge stock of prairie-style and art deco homes. The Gary Masonic Temple is located in the neighborhood, along with the Ambassador apartment building. Located just south of Interstate 90, the neighborhood can be seen while passing Buchanan Street.

Gary Centennial Landmark

Brunswick is located on Gary's far west side. The neighborhood is located just south of Interstate 90 and can also be seen from the expressway. The Brunswick area includes the Tri-City Plaza shopping center on West 5th Avenue (U.S. 20). The area is south of the Gary Chicago International Airport.

Tolleston is one of Gary's oldest neighborhoods, predating much of the rest of the city. It was platted by George Tolle in 1857, when the railroads were constructed to this area. This area is west of Midtown and south of Ambridge Mann. Tarrytown is a subdivision located in Tolleston between Whitcomb Street and Clark Road.

Black Oak is located on the far southwest side of Gary, in the vicinity of the Burr Street exit to the Borman Expressway. It was annexed in the 1970s. Prior to that, Black Oak was an unincorporated area informally associated with Hammond, and the area has Hammond telephone numbers. After three referendums, the community voters approved annexation, having been persuaded by Mayor Hatcher that they would benefit more from services provided by the city than from those provided by the county. In the 20th-century, it is the only majority-white neighborhood in Gary.

Glen Park is located on Gary's far south side and is made up mostly of mid-twentieth-century houses. Glen Park is divided from the remainder of the city by the Borman Expressway. The northern portion of Glen Park is home to Gary's Gleason Park Golf Course and the campus of Indiana University Northwest. The far western portion of Glen Park is home to the Village Shopping Center. Glen Park includes the 37th Avenue corridor at Broadway.

Midtown is located south of Downtown Gary, along Broadway. In the pre-1960s days of de facto segregation, this developed historically as a "black" neighborhood as African Americans came to Gary from the rural South in the Great Migration to seek jobs in the industrial economy.

Aetna is located on Gary's far east side along the Dunes Highway. Aetna predates the city of Gary. This company town was founded in 1881 by the Aetna Powder Works, an explosives company. Their factory closed after the end of World War I.

The Town of Aetna was annexed by Gary in 1928, around the same time that the city annexed the Town of Miller. In the late 1920s and early 1930s, Gary's prosperous industries helped generate residential and other development in Aetna, resulting in an impressive collection of art deco architecture. The rest of the community was built after World War II and the Korean War in the 1950s, in a series of phases. On its south and east, Aetna borders the undeveloped floodplain of the Little Calumet River.

Emerson is located in north-central Gary on the east side of Broadway. Located just south of Interstate 90, Gary City Hall is located in Emerson, along with the Indiana Department of Social Services building and the Calumet Township Trustee's office. A 6,000-seat minor league baseball stadium for the Gary SouthShore RailCats, U.S. Steel Yard, was constructed in 2002, along with contiguous commercial space and minor residential development.

Miller Beach, also known simply as Miller, is on Gary's far northeast side. Settled in the 1850s and incorporated as an independent town in 1907, Miller was annexed by the city of Gary in 1918. Miller developed around the old stagecoach stop and train station known by the 1850s as Miller's Junction and/or Miller's Station.

Miller Beach is racially and economically diverse. It attracts investor interest due to the many year-round and summer homes within walking distance of Marquette Park and Lake Michigan. Prices for lakefront property are affordable compared to those in Illinois suburban communities. Lake Street provides shopping and dining options for Miller Beach visitors and residents. East Edge, a development of 28 upscale condominium, townhome, and single-family homes, began construction in 2007 at the eastern edge of Miller Beach along County Line Road, one block south of Lake Michigan.[26]

The city is located at the southern end of the former lake bed of the prehistoric Lake Chicago, and the current Lake Michigan. Most of the city's soil, to nearly one foot below the surface, is pure sand. The sand beneath Gary, and on its beaches, is of such high quality that in years past it was mined for the manufacture of glass.[citation needed]

According to the 2010 census, Gary has a total area of 57.18 square miles (148.10 km2), of which 49.87 square miles (129.16 km2) (or 87.22%) is land and 7.31 square miles (18.93 km2) (or 12.78%) is water.[27]

Gary is listed by the Köppen-Geiger climate classification system as humid continental (Dfa). In July and August, the warmest months, high temperatures average 84 °F (29 °C) and peak just above 100 °F (38 °C), and low temperatures average 63 °F (17 °C). In January and February, the coldest months, high temperatures average around 29 °F (−2 °C) and low temperatures average 13 °F (−11 °C), with at least a few days of temperatures dipping below 0 °F (−18 °C).

The weather of Gary is greatly regulated by its proximity to Lake Michigan. Weather varies yearly. In summer months Gary is humid. The city's yearly precipitation averages about 40 inches. Summer is the rainiest season. Winters vary but are predominantly snowy. Snowfall in Gary averages approximately 25 inches per year. Sometimes large blizzards hit because of "lake effect snow", a phenomenon whereby large amounts of water evaporated from the lake deposit onto the shoreline areas as inordinate amounts of snow.

As of the census[4] of 2010, there were 80,294 people, 31,380 households, and 19,691 families residing in the city. The population density was 1,610.1 inhabitants per square mile (621.7/km2). There were 39,531 housing units at an average density of 792.7 per square mile (306.1/km2). The racial makeup of the city was 84.8% African American, 10.7% White, 0.3% Native American, 0.2% Asian, 1.8% from other races, and 2.1% from two or more races. Hispanic or Latino people of any race were 5.1% of the population. Non-Hispanic Whites were 8.9% of the population in 2010,[33] down from 39.1% in 1970.[34]

There were 31,380 households of which 33.5% had children under the age of 18 living with them, 25.2% were married couples living together, 30.9% had a female householder with no husband present, 6.7% had a male householder with no wife present, and 37.2% were non-families. 32.8% of all households were made up of individuals and 11.9% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 3.23.

The median age in the city was 36.7 years. 28.1% of residents were under the age of 18; 8.6% were between the ages of 18 and 24; 21.8% were from 25 to 44; 27.1% were from 45 to 64; and 14.5% were 65 years of age or older. The gender makeup of the city was 46.0% male and 54.0% female.

As of the census of 2000, there were 102,746 people, 38,244 households, and 25,623 families residing in the city. The population density was 2,045.5 people per square mile (789.8/km²). There were 43,630 housing units at an average density of 868.6 per square mile (335.4/km²). The racial makeup of the city was 84.03% African American, 11.92% White, 0.21% Native American, 0.14% Asian, 0.02% Pacific Islander, 1.97% from other races, and 1.71% from two or more races. Hispanic or Latino people of any race were 4.93% of the population.

There were 38,244 households out of which 31.2% had children under the age of 18 living with them, 30.2% were married couples living together, 30.9% had a female householder with no husband present, and 33.0% were non-families. 28.9% of all households were made up of individuals and 9.4% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.28.

In the city, the population was spread out with 29.9% under the age of 18, 10.1% from 18 to 24, 25.1% from 25 to 44, 22.2% from 45 to 64, and 12.8% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 84.6 males. For every 100 females age 18 and over, there were 78.0 males.

The median income for a household in the city was $27,195, and the median income for a family was $32,205. Males had a median income of $34,992 versus $24,432 for females. The per capita income for the city was $14,383. About 22.2% of families and 25.8% of the population were below the poverty line, including 37.9% of those under age 18 and 14.1% of those age 65 or over.

Meredith Willson's 1957 Broadway musical The Music Man featured the song "Gary, Indiana", in which lead character (and con man) Professor Harold Hill wistfully recalls his purported hometown, then prosperous. Hill claims to be an alumnus of "Gary Conservatory of Music, Class of '05," but this is later revealed to be another of his lies. The City of Gary was not founded until 1906. Willson's musical, set in 1912, was adapted both as a film of the same name released in 1962, and as a television film, produced in 2003.

The Gary Public Library System consists of the main library at 220 West 5th Avenue and several branches: Brunswick Branch, W. E. B. DuBois Branch, J. F. Kennedy Branch, Tolleston Branch, and Woodson Branch.[38] In March 2011, the Gary Library Board voted to close the main library on 5th Avenue and the Tolleston branch in what officials said was their best economic option. The main library closed at the end of 2011. The building now houses a museum.[39]

Lake County Public Library operates the Black Oak Branch at 5921 West 25th Avenue in the Gary city limits.[40] In addition, Indiana University Northwest operates the John W. Anderson Library on its campus.[41]

Most public schools in Gary are administered by the Gary Community School Corporation. The other public schools within the city are administered by Lake Ridge Schools Corporation, which is the school system for the Black Oak neighborhood and unincorporated Calumet Township. Due to annexation law, Black Oak residents retained their original school system and were not required to attend Gary public schools.

Charter schools in Indiana, including those in Gary, are granted charters by one of a small number of chartering institutions. Indiana charter schools are generally managed in cooperation between the chartering institution, a local board of parents and community members, salaried school administrators, and a management company. Charter schools in Gary as of 2011 include Thea Bowman Leadership Academy, Charter School of the Dunes, Gary Lighthouse Charter School (formerly, Blessed Sacrament Parish and Grade School), and 21st Century Charter.

WYIN (Channel 56) is a PBS affiliate licensed to Gary. Their studios are in Merrillville.

WGVE (FM 88.7) is owned by the Gary Community School Corporation, and is used primarily as a teaching facility. Programming is maintained by students in the broadcast program at the Gary Career Center. WGVE also carries limited NPR programming.

WLTH (AM 1370) primarily carries talk programming, as well as other local programs.

WWCA (AM 1270) is a Relevant Radio owned-and-operated radio station, carrying programming from the Catholic-oriented Relevant Radio network.

Gary Public Transportation Corporation (GPTC) a commuter bus system that offers service to numerous stops throughout the city and neighboring suburbs. GPTC also has express service to locations outside the city, including connections to Chicago transit. Front-door pickup is available for disabled citizens at no extra cost.

Gary/Chicago International Airport is operating as the "third airport" for the Chicago area. With a new runway,[9] it is undergoing much federally funded expansion, and the administration is courting airlines aggressively. The National Guard is intending to base its Chicago area air operation there as well.[45]

Michael Jackson's childhood home in Gary, Indiana, shortly after the singer's death in 2009

Gary is the hometown of The Jackson 5, a family of musicians who influenced the sound of modern popular music. In 1950, Joseph and Katherine Jackson moved from East Chicago, Indiana[46] into their two-bedroom house at 2300 Jackson Street. They had married on November 5, 1949. Their entertainer children later recorded a song entitled "2300 Jackson Street" (1989). The Jackson children include: